Sort vocabulary by "times seen"
I think it would be great to add the number of times a vocab word has been seen to the main vocab page and enable sorting the words by this statistic.
Some have suggested that it takes 20-50 exposures to a word in order to acquire it. so this would be a useful statistic, as well as being able to know how many words you have seen at a certain threshold, say 20 and/or 50 times.
Keep up the great work. I love it!!!
I agree, because as far as the "strength" DuoLingo assigns each and every word I know, I don't exactly know what the means. Since I took a huge break from Duolingo most of my words have a lower score than they should, because I won't ever forget the basics. Your idea would be perfect to see the words you actually know, and not just the ones that you saw once five minutes ago...